add option to change print level from command line:  - stressHistogram 1  :  to print result for all tests  - stressHistogram 2   : to print each comparison test, done for each bin
add option to change print level from command line: 
- stressHistogram 1  :  to print result for all tests 
- stressHistogram 2   : to print each comparison test, done for each bin


git-svn-id: ecbadac9c76e8cf640a0bca86f6bd796c98521e3@36138 27541ba8-7e3a-0410-8455-c3a389f83636

bbannier/ROOT,dawehner/root,dawehner/root,dawehner/root,dawehner/root,dawehner/root,bbannier/ROOT,dawehner/root,bbannier/ROOT,bbannier/ROOT,bbannier/ROOT,dawehner/root,bbannier/ROOT,dawehner/root,bbannier/ROOT